New Generation of Moire Superlattices in Doubly Aligned hBN/Graphene/hBN Heterostructures

Wang, Lujun and Zihlmann, Simon and Liu, Ming-Hao and Makk, Peter and Watanabe, Kenji and Taniguchi, Takashi and Baumgartner, Andreas and Schonenberger, Christian. (2019) New Generation of Moire Superlattices in Doubly Aligned hBN/Graphene/hBN Heterostructures. Nano Letters, 19 (4). pp. 2371-2376.

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Official URL: https://edoc.unibas.ch/73761/

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The specific rotational alignment of two-dimensional lattices results in a moire superlattice with a larger period than the original lattices and allows one to engineer the electronic band structure of such materials. So far, transport signatures of such superlattices have been reported for graphene/hBN and graphene/graphene systems. Here we report moire superlattices in fully hBN encapsulated graphene with both the top and the bottom hBN aligned to the graphene. In the graphene, two different moire superlattices form with the top and the bottom hBN, respectively. The overlay of the two superlattices can result in a third superlattice with a period larger than the maximum period (14 nm) in the graphene/hBN system, which we explain in a simple model. This new type of band structure engineering allows one to artificially create an even wider spectrum of electronic properties in two-dimensional materials.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Wang, Lujun and Zihlmann, Simon and Makk, Peter and Baumgartner, Andreas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:14 Apr 2020 16:35
Deposited On:14 Apr 2020 16:35

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